If you find yourself taking and sharing a lot of screenshots outside of Steam. Install the Shotty plugin for Decky Loader to have then organized and accessible without needing to dig into Proton prefixes.

And then, access your ~/Pictures/Screenshots folder over SFTP from your phone or some other PC for efficient shitposting!

P.S. I use Solid Explorer on Android for SFTP.

P P.S. Set up SSH as soon as you can. It’s saved me a lot of effort when I boot-looped my Deck by creating a bunch of circular symlinks 🙃